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1 Introduction to Instructions for Safety Control Units and Interpreting Instruction Descriptions
NX-series Safety Control Unit Instructions Reference Manual (Z931)
1-2 Interpreti
ng In
stru
ctio
n
Descrip
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1
-2-4
T
imer Set V
alues
Time set values, such as those for
DiscrepancyTime
or the OFF-Delay Timer instruction, operate in
increments of the safety task period.
The timer error is +1 safety task period. Every safety task period, a timer value is checked to see if it
has reached the set time. If the timer value reaches the set time immediately after this check, the time
is delayed by one safety task period.
Examples are provided below.
When the OFF-Delay Timer Instruction Is Set to 500 ms and the Safety Task
Period Is Set to 16 ms
The timer will time out 512 ms (16 ms
×
32) after the safety task is started.
When the OFF-Delay Timer Instruction Is Set to 500 ms and the Safety Task
Period Is Set to 20 ms
The timer will time out 520 ms (20 ms
×
26) after the safety task is started. Care is required because
the timer will not operate at 500 ms.
Refer to the
NX-series Safety Control Unit User’s Manual
(Cat. No. Z930) for details on the safety task
period.
Precautions for Correct Use
The time when an OFF-Delay Timer instruction times out can affect the safety reaction times.
1-2-4
Timer Set Values
Содержание NX-SL series
Страница 8: ...CONTENTS 6 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 14: ...Terms and Conditions Agreement 12 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 28: ...Sections in this Manual 26 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 98: ...2 Standard Functions 2 64 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 104: ...2 Standard Functions 2 70 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 110: ...2 Standard Functions 2 76 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 130: ...3 Safety Standard Function Blocks 3 20 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 265: ...I 1 I NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
Страница 268: ...I 4 NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
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